Medical sensor and technique for using the same
First Claim
Patent Images
1. A sensor comprising:
- a sensor body adapted to operate in a transmission mode;
an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue;
a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and
at least one protrusion disposed on a tissue-contacting surface of the sensor body, wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially not in-line with an imaginary axis connecting the emitter and the detector.
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Abstract
A medical sensor may be adapted to account for factors that cause irregularities in pulse oximetry measurements or other spectrophotemetric measurements. Sensors are provided with surface features that reduce the amount of outside light or shunted light that impinge the detecting elements of the sensor. The sensor is adapted to reduce the effect of outside light or shunted light on pulse oximetry measurements.
174 Citations
33 Claims
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1. A sensor comprising:
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a sensor body adapted to operate in a transmission mode;
an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue;
a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and
at least one protrusion disposed on a tissue-contacting surface of the sensor body, wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially not in-line with an imaginary axis connecting the emitter and the detector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A pulse oximetry system comprising:
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a pulse oximetry monitor; and
a pulse oximetry sensor adapted to be operatively coupled to the monitor, the sensor comprising;
a sensor body;
an emitter disposed on the sensor body, wherein the emitter is adapted to deliver a first light into a tissue;
a detector disposed on the sensor body, wherein the detector is adapted to detect the first light; and
at least one protrusion disposed on a tissue-contacting surface of the sensor body, wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially not in-line with an imaginary axis connecting the emitter and the detector. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method comprising:
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delivering a first light through a patient'"'"'s tissue;
detecting the first light delivered through the tissue; and
redirecting a second light that does not propagate through the tissue away from the detector with a protruding feature. - View Dependent Claims (24, 25, 26, 27)
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28. A method comprising:
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providing a transmission-type sensor body;
providing an emitter adapted to transmit a first light into tissue;
providing a detector adapted to detect the first light;
providing at least one protrusion disposed on a tissue-contacting surface of the sensor body, wherein the at least one protrusion is adapted to reduce the amount of a second light impinging the detector at an incident angle substantially not in-line with an imaginary axis connecting the emitter and the detector. - View Dependent Claims (29, 30, 31, 32, 33)
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Specification